OWLS electron number density field returns no value

[cphyc]

I randomly stumbled upon this piece of code which seems to be missing a return statement. Is that on purpose?

yt/yt/frontends/owls/fields.py

Lines 201 to 204 in 35ce91c

	def _el_number_density(field, data):
	n_e = data[ptype, "H_p1_number_density"]
	n_e += data[ptype, "He_p1_number_density"]
	n_e += 2.0 * data[ptype, "He_p2_number_density"]

[matthewturk]

Wow, yeah. Good point!

I don't remember who had taken on the OWLS frontend, but I think @chummels may have done some work with it (perhaps via EAGLE?) some bit ago.

[jzuhone]

I think I touched this last, will submit a fix.